Mat-cutter.



No. 660,2". Patented' Oct. 23, I900. [I C DURKEL MAT CUTTER.

(Application filed Feb. 2, 1900.)

(No Model.)

Wit 1155555: MXZQM UNITED STATES PATENT OFFICE.

CARL C. DURKEL, OF RICHMOND, INDIANA.

MAT-CUTTER.

SPECIFIGA TIGN forming part of Letters Patent No. 660,211, dated October 23, 1900.

Application filed February 2, 1900. Serial No. 3,658. (No model.)

To all whom it may concern..-

Be it'known that I, CARL C. DURKEL, a citizen of the United States, residing at Richmond, in the county of Wayne and State of Indiana, have invented new and useful Improvementsin Mat-Cutters, of which the following is a specification.

My invention relates to a device for cutting out the centers of picture-mats, so as to leave the opening in the mat of a circular or elliptical form, the inside edge of the mat being out bevel.

One object of my invention is to provide a device for cutting picture-mats with the sight thereof of a circular or elliptical form and for cutting the inside edge beveled.

Another object is to provide anew article of manufacture that can be made and sold at a very low price and at the same time be effectual and perfectly adapted for the work stated.

I accomplish these objects by the arrangement and combination of parts hereinafter described, and shown in the accompanying drawings.

Referring'to the drawings, Figure 1 is a top View of the device. Fig. 2 is a sectional view of the arm and of the parts to be attached thereto. Fig. 3 is a detail view of the triangular block E. Fig. 4 is a detail View of the triangular block F and is of same form and construction as F, Fig. 3. Fig. 5 is a side or edge elevation of the base A, showing the form of the undercut slots D, C, and E. Fig. 6 is a detail view of the knife 2 and the knifeholder 3, showing a front view of same.

The body of my device consists of a base A, preferably round or of hexagon shape and about one inch in thickness, having cut in its face the circular undercut groove E and also two straight undercut grooves along lines diametrical to the circular groove and at right angles to each other.

B represents an arm' of any convenient length.

F and F represent blocks of a triangular form, as shown in Figs. 3 and 4., F to be attached to the arm B, near the inner end of said arm, by a thumb-screw K, and F being also attached to the arm 13 at a sufficient distance from the other block F by a thumbscrew L to allow the block F to be in the center of A while the block F is in the groove E.

3 represents the knife holder, which is adapted to be secured at any point onthe arm B by passing the arm B through the opening 6 of said knife-holder and secured at any point by the thumb-screw M. Said knifeholder is of atrapezoid form, and diagonally across the angle thereof is a groove, into which is fitted a knife 2. in the upper part of the knife, and the knife is secured in place on the holder by a screw 5, passing through the slot 4 and threaded into the holder 3. Referring now to Fig. 1, one of the sections inclosed by the groove in the block Aas for instance, the section marked Z-should be made removable and secured in place by screws X X. This is found necessary for more'read-ily changing the block F from the groove E to the groove D, or vice versa.

It will now be seen that if the device he placed on a cardboard, the inside block F being secured in the center of the device, as shown in Fig. 1, using the screw K as a center pivot and allowing the block F to slide in the channel E, turning the arm B to the right, so as to allow the knife 2 to cut the cardboard, a circle will be cutout of the cardboard, the size depending on the distance of the knife from the center K. Now if it should be desired to cut an elliptical opening in the cardboard both blocks F and F will be allowed to be free, F being in the groove C and F being in the groove Df0r instance, the

block F will be in the groove 0 and in the center of the device, the block F being at the upper part of the groove D. Now the block F will be moved to the left and the block F will slide downward in the groove D until it comes to the center of A, where F started from. The block F willnow be at the extreme left of A. Continue to move the block F down until it comes to the lower part of the groove D, when F will again be in the center of A. Now move F upward through D and F to the left in C. When F arrives at the center of A, F will be at the extreme leftof 0. Move F up to its original starting-point, which will return F to its starting-point, when it will be found that the (See Fig. 5.) A slot 4 is' knife 2 has traversed over the cardboard in a perfect ellipse, and if sufficient pressure has been given to the knife it will have cut through the cardboard an elliptical design with a bevel edge. I

It is evident that by removing the knifeholder and substituting therefor a holder of similar construction carrying a glass-cutter my device can be used for cutting glass in circular or elliptical shapes.

My improved on! ter is perfectly adapted to accomplish the results for which it is intended, and it is evident that changes in and modifications of the construction. herein described may be made Without departing from the spirit of my invention or sacrificing its advantages.

Having described my invention, I claim as new and desire to secure by Letters Patent- 1. The combination, of a base A having cut in its face the circular undercut groove E and also two straight undercut grooves along lines diametrical to the circular groove and at right angles to each other, a cutting knife 2 sel A, all as described and set forth.

2. In a cardboard-cutter, the combination of the base A with undercut grooves C and D,

at right angles to each other, a circular groove E around the face of A and uniting with the grooves G and D, blocks F and F of a triangular form adapted to slide in said grooves,

an arm B connecting said blocks and extend- 1 ing out to any desired length, a knite-holder 3 and a knife 2, as shown, adapted to be secured at any point on the arm B, all as described and for the purposes set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CARL G. DURKEL.

Witnesses:

H. L. CANBY, R. E. HANDLE. 

